Assignment makes pointer from Integer without a Cast in Structure

Question

I'm making a program that dynamically creates a list of integers.

int ins_dlist(int data, struct dlist **p){
struct dlist *q;

if((*p)->sz == (*p)->maxsz){
    q = realloc(*p, DLISTSZ((*p)->maxsz + INCRSZ));
    if(q == NULL)
        return (-1);
    q->maxsz += INCRSZ;
    *p = q;
}

//(*p)->item[(*p)->sz++] = data; <-Gives me pointer from integer without cast
*((*p)->item + (*p)->sz++) = data;
return(0);

}

My problem is on *((*p)->item + (*p)->sz++) = data; I tried declaring it in different ways but I still can't get access to the sz variable in my struct. Heres my struct declaration, its inside a file named dlist.h:

#include <stdlib.h>
struct dlist{
     int sz;
    int maxsz;
    int *item[1];
};

#define INITSZ 5
#define INCRSZ 5
#define DLISTSZ(n) ((size_t)(sizeof(struct dlist)) + ((n-1)*sizeof(int)))

struct dlist *init_dlist(int num);
int ins_dlist(int data, struct dlist **p);

Review your declaration of struct dlist or post it here.

Marian
– Marian

2014-02-10 08:21:10 +00:00
Commented Feb 10, 2014 at 8:21 — Marian
– Marian, Commented Feb 10, 2014 at 8:21
I declared it in a file called dlist.h, edited my post

HighMrSai
– HighMrSai

2014-02-10 08:44:22 +00:00
Commented Feb 10, 2014 at 8:44 — HighMrSai
– HighMrSai, Commented Feb 10, 2014 at 8:44

Marian · Accepted Answer · 2014-02-10 09:19:23Z

1

You probably wanted to define dllist as:

struct dlist{
   int sz;
   int maxsz;
   int item[1];
};

answered Feb 10, 2014 at 9:19

Marian

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